UV Index Calculator

Calculate the UV Index from solar zenith angle, ozone column, altitude, and cloud cover. Provides WHO UV risk category and recommended sun protection based on the Global Solar UV Index scale.

 
0
Physical Constants Reference
ConstantSymbolValue
Speed of lightc2.99792458×10⁸
Planck's constanth6.62607015×10⁻³‴
Boltzmann constant1.380649×10⁻²³
Avogadro's numberNₐ6.02214076×10²³
Gravitational constantG6.6743×10⁻¹¹
Gas constantR8.31446
Elementary chargee1.602176634×10⁻¹⁹
Electron massmₑ9.1093837015×10⁻³¹
Proton massmₚ1.67262192369×10⁻²⁷
Fine-structure constantα7.2973525693×10⁻³
Advertisement

How It Works

Calculate the UV Index from solar zenith angle, ozone column, altitude, and cloud cover. Provides WHO UV risk category and recommended sun protection based on the Global Solar UV Index scale

Each component has a specific meaning:

  • Solar zenith angle — The solar zenith angle recorded for the scenario being assessed.
  • Ozone column — The ozone column recorded for the scenario being assessed.
  • Altitude — The altitude recorded for the scenario being assessed.
  • Cloud cover — The cloud cover recorded for the scenario being assessed.

Note: Interpret the uv index result against the thresholds and context described above.

How to Use

Enter the solar zenith angle, ozone column, altitude, cloud cover for the scenario you are assessing. Calculate the UV Index from solar zenith angle, ozone column, altitude, and cloud cover. Provides WHO UV risk category and recommended sun protection based on the Global Solar UV Index scale. Use the uv index result to inform your calculation.

Frequently Asked Questions